0500Patch 5.4.0 (10-Sep-2013) Ghoul's Leap and Gnaw abilities are no longer on a global cooldown, and no longer cost Energy.

0300Patch 3.2.0 (04-Aug-2009):Raise Ally: Using the Gnaw ability while under the effects of this spell will now initiate auto-attack. In addition, the damage done has been changed from a flat value to a percentage of weapon damage.